Coding-Decoding
Letter shifts, A=1 codes, and symbol keys — decode step by step.
3 topics • Notes • Practice • AI explanations available
1. Letter Coding
Each letter moves +1 or +2 — code a new word the same way.
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2. Number Coding
A=1 to Z=26; digits spell words; simple position sums.
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3. Symbol
Use a symbol key table to decode letters or numbers.
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